US20070259745A1 - Centre of Rotation Support for an Assembly - Google Patents

Centre of Rotation Support for an Assembly Download PDF

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Publication number
US20070259745A1
US20070259745A1 US11/574,162 US57416205A US2007259745A1 US 20070259745 A1 US20070259745 A1 US 20070259745A1 US 57416205 A US57416205 A US 57416205A US 2007259745 A1 US2007259745 A1 US 2007259745A1
Authority
US
United States
Prior art keywords
assembly
tension system
fastening
holder
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/574,162
Other languages
English (en)
Inventor
Ralph Painta
Michael Bogner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHO Holding GmbH and Co KG
Original Assignee
INA Schaeffler KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by INA Schaeffler KG filed Critical INA Schaeffler KG
Assigned to SCHAEFFLER KG reassignment SCHAEFFLER KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BOGNER, MICHAEL, PAINTA, RALPH
Publication of US20070259745A1 publication Critical patent/US20070259745A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
    • F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
    • F16H7/14—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of a driving or driven pulley
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/165—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1737—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/26—Means for adjusting casings relative to their supports

Definitions

  • the present invention relates to an assembly of an internal combustion engine, said assembly being designed at the same time as a tension system for a traction means of a traction mechanism.
  • the assembly provided is preferably a generator or a starter generator.
  • the housing of the assembly comprises holding means which, with at least one holder arranged at a fixed location, preferably on the internal combustion engine, form a rotary bearing.
  • a traction mechanism is preferably provided for driving various individual assemblies of the combustion engine, such as the water pump, air conditioning compressor and steering booster pump.
  • a traction means in particular a belt, connects the individual belt pulleys of the assemblies to be driven, the driving members, to the belt pulley of the driven member, a belt pulley preferably connected to the crankshaft of the internal combustion engine.
  • the nonslip drive of all the assemblies to be driven requires a tension system, by means of which a sufficient, preferably nonslip pretensioning of the traction means can be ensured.
  • a tension system of this type is known, for example, from DE 43 00 178 C1, in which, in the installed state, a tension roller is supported under the action of force on the traction means.
  • the tension system comprises, furthermore, a base part which is arranged at a fixed location and the axis of symmetry of which at the same time forms an axis of rotation for the pivoting arm on which a tension roller is arranged rotatably on the outside.
  • a torsion spring is inserted between the base part and the pivoting arm.
  • DE 100 57 818a A1 discloses a traction mechanism, designed as a two-pulley mechanism, of an internal combustion engine.
  • the drive in this case takes place via a driven member which is connected rigidly in terms of rotation to a crankshaft of the internal combustion engine and which via a traction means, a belt, connects the further belt pulley, the driving member.
  • the driving member provided is a starter generator which assumes the function of both the starter and the generator for the internal combustion engine.
  • a sufficient pretensioning of the traction means to achieve a nonslip drive is achieved by means of the pivotably arranged driving member which is additionally acted upon with force by a spring means.
  • the object on which the present invention is based is to develop an assembly of an internal combustion engine, said assembly being designed at the same time as a tension system for a traction means of a traction mechanism, according to the features of the preamble of claim 1 , in order to achieve a cost-optimized center of rotation support.
  • the support is to be configured such that an optimal introduction of force into the center of rotation support is established.
  • the housing of the pivotable assembly which comprises, in particular, a starter generator, is designed in a divided way with two housing elements or housing halves which are joined together via a parting plane.
  • the housing elements are in this case supported with respect to one another by a machined surface in the region of the parting plane. This ensures that a large-area support of the housing elements and therefore a distortion-resistant housing are obtained.
  • the housing of the assembly includes, furthermore, at least one fastening lug as holding means.
  • each housing element comprises a fastening lug, which fastening lugs together, in the installed state, that is to say in the completed state of the assembly or of the starter generator, are supported over a large area via a supporting surface and jointly form a holding means.
  • the holding means combined with a preferably axially offset holder which is connected, for example, directly to the internal combustion engine, forms a rotary bearing for the assembly.
  • a support base made longer can be implemented for the assembly designed as a starter generator.
  • forming the holding means on the housing makes it possible to have a high-mass tie-up of the assembly, with the result that the latter, in particular a starter generator, can be mounted so as to project freely.
  • the rotary bearing according to the invention brings about a reinforced fastening or tie-up of the assembly to the internal combustion engine and, at the same time, an increased useful life.
  • each housing element of the housing is assigned a fastening lug.
  • an aligned coincidence of the parting plane of the housing elements with the supporting surface of the associated holding means configured as fastening lugs is provided. Consequently, the surfaces to be machined lie in one plane, thus resulting in simplified machining. The smaller number of surfaces to be machined separately affords a cost benefit in terms of the housing.
  • This construction of the rotary bearing requires merely a separate machining of one end face of the holding means in the region of the contact surface via which the holding means is supported on the holder.
  • the holding means only one housing element or one housing half of the assembly has a fastening lug.
  • the position and arrangement of the holding means are in this case such that the jointly machined end face, coinciding with the parting plane, of the fastening lug constitutes the contact surface with which the holding means, the fastening lug, is supported on the holder.
  • the concept according to the invention allows cost-optimized manufacture of the housing, since the machining of the housing halves in the region of the parting plane requires no subsequent machining of the supporting surfaces or of the contact surface of the holding means.
  • the parting plane of the housing of the assembly advantageously runs eccentrically such that it is arranged as near as possible in the direction of the belt pulley of the assembly.
  • the rotary bearing according to the invention can likewise be combined with an eccentrically divided housing, in which the housing element assigned to the traction means is made wider, as compared with the associated further housing element.
  • the invention includes a rotary bearing, in which the fastening lug or fastening lugs, the holding means, is or are arranged so as to be axially offset with respect to the parting line, that is to say the parting line of the housing elements is nbot aligned with the contact surface of the holding elements.
  • the holder which is connected indirectly or directly to the internal combustion engine, includes a rotatable bush which, in the installed state, is fixed in terms of rotation to the holding means of the pivotable assembly.
  • fastening means in particular, a screw by means of which the components of the rotary bearing, the bush of the holder and the holder are braced.
  • fastening lug assigned to the holder with a through bore and to introduce into the further fastening lug a threaded bore in which the screw is screwed.
  • a further embodiment of the invention relates to the configuration of the holder which, according to the invention, is configured in a U-shaped carrier or as a fork. These components form two receptacles which are offset axially with respect to one another and between which the fastening lug or fastening lugs is or are inserted. A shaft or a fastening screw connects the receptacles and at the same time guides the holding means, and consequently the assembly is thereby positioned.
  • one receptacle is designed as a fixed bearing and the other receptacle as a loose bearing.
  • a selftapping or selfcutting screw which alone, that is to say without a screw nut, makes it possible to have effective permanent connection and securing, is preferably suitable as fastening means.
  • a separate bracket which is preferably fastened releasably to the internal combustion engine by means of a screw connection.
  • the bracket in this case forms a holder which with holding means of the assembly forms the rotary bearing.
  • Optimal low-friction support of the assembly can advantageously take place via a plain bearing, by means of which the bush is inserted in the holder and connected rigidly in terms of rotation to the assembly.
  • the invention likewise includes a reversed arrangement, in which the bush is rotatably assigned via a plain bearing to the holding means, for example the fastening lugs of the generator, and, on the other hand, is fixed in position with respect to the holder.
  • the rotary bearing according to the invention can be coupled to a damping device, in order thereby to eliminate adverse resonances of the traction mechanism or to damp oscillations introduced into the traction mechanism on account of the rotational nonuniformity of the internal combustion engine. It is appropriate, as a damping device, for the rotary bearing to have a pretensioned design, in which a friction disk is arranged, for example, between the components of the rotary bearing which are rotatable in relation to one another.
  • a nonslip drive of the traction mechanism requires a sufficiently pretensioned traction means.
  • the pivotable assembly which at the same time assumes the function of the tension system, is provided with a rotary bearing, the position of which makes it possible to utilize the dead weight of the pivotable assembly in order to influence the pretension of the traction means.
  • a force means may additionally be provided for assistance, by which the assembly, the starter generator, is acted upon with force in the direction of rotation which pretensions the traction means.
  • FIG. 1 shows the construction of a rotary bearing of a tension system according to the invention
  • FIG. 2 shows a further rotary bearing constructed according to the invention for a tension system
  • FIG. 3 shows an enlarged illustration of a detail of the rotary bearing according to FIG. 2 ;
  • FIG. 4 shows a part region of an assembly which is designed pivotably as a tension system and in which the holding means is connected to only one housing element of the assembly;
  • FIG. 5 shows a basic illustration of a traction mechanism which includes a pivotable assembly as a tension system.
  • the traction mechanism 1 is designed as a two-pulley mechanism, in which a traction means 2 connects a driven member 3 , a belt pulley connected to a crankshaft of the internal combustion engine 4 and a further belt pulley of a driving member 5 .
  • the driving member 5 provided is a pivotably arranged assembly 6 , in particular a starter generator, which for the internal combustion engine 4 , as a function of the operating mode, assumes the function of the starter in the starting phase and the function of a generator when the internal combustion engine 4 is running.
  • the assembly 6 is pivotable about an axis of rotation 7 of the rotary bearing 8 .
  • the rotary bearing 8 comprises a holder 9 connected in one piece to the internal combustion engine 4 , and also associated holding means 10 of the assembly 6 .
  • a counterclockwise pivoting of the assembly 6 increases the pretension of the traction means 2 .
  • the position of the rotary bearing 8 promotes the pretensioning of the traction means 2 , since this, utilizing the weight of the assembly 6 , exerts a force component acting counterclockwise.
  • the assembly 6 which performs the function of a tension system 11 , is provided with a force means 12 , in particular a spring which is inserted between the internal combustion engine 4 and the assembly 6 and by means of which the pretension of the traction means 2 can be increased.
  • FIG. 1 shows a first rotary bearing 17 a designed according to the invention, which comprises as holding means 20 a fastening lugs 14 , 15 connected in one piece to a housing 13 of the assembly 6 , and also a holder 19 a .
  • the housing 13 of the assembly 6 is formed from the two housing elements 16 a , 16 b which are supported via a parting plane 18 a .
  • the parting plane 18 a is continued beyond the region of the fastening lugs 14 , 15 , so that, by a machining of the respective housing element 16 a , 16 b , including the associated fastening lugs 14 and 15 , at the same time a supporting surface 21 is machined, via which the fastening lugs 14 , 15 are supported in the installation position.
  • the fastening lug 14 is directly supported with an end face facing away from the supporting surface 21 on an end face of the holder 19 a , said end faces jointly forming a contact surface 22 .
  • the holder 19 a connected directly or indirectly to the internal combustion engine 4 is provided with a through bore 23 into which a bush 24 is inserted.
  • a plain bearing 25 is inserted in an annular gap which is formed between the through bore 23 and a surface area of the bush 24 .
  • the bush 24 is supported nonpositively on the fastening lug 14 and consequently on the holding means 20 a by a fastening means, a screw 26 .
  • the configuration according to the invention of the rotary bearing 17 a allows displacement in the direction of the traction means 2 , with the result that the force direction introduced into the assembly 6 by the traction means 2 in the direction of the arrow triggers a reduced tilting moment in the rotary bearing 17 a , this having an advantageous effect on the load exerted on the plain bearing 25 , with the result that an increased useful life can be implemented.
  • FIGS. 2 and 4 the components identical to those of the first exemplary embodiment ( FIG. 1 ) are given the same reference numerals, so that, to avoid repetition, reference may be made to the description of the first exemplary embodiment.
  • FIG. 2 shows the rotary bearing 17 b which comprises a holder 19 b of U-shaped configuration, for example a separate bracket which is fastened, on the one hand, releasably to the internal combustion engine 4 and comprises two receptacles 33 , 34 spaced apart axially.
  • the holding means 20 a consisting of the fastening lugs 14 , 15 is inserted between the receptacles 33 , 34 .
  • the receptacles 33 , 34 in conjunction with the bushes 24 inserted in them, according to the first exemplary embodiment, make it possible to have an arrangement free of play.
  • the bushes 24 are pressed against the holding means 20 a , the fastening lugs 14 , 15 , by means of the screw 35 via the contact surfaces 22 , 44 .
  • This nonpositive connection ensures, during a pivoting movement of the assembly 6 , that there is a relative movement of the bushes 24 in relation to the respective receptacle 33 , 34 , the receptacles comprising plain bearings 25 comparably to the exemplary embodiment according to FIG. 1 .
  • the latter includes a receptacle 33 designed as a fixed bearing 36 and a receptacle 34 designed as a loose bearing 37 .
  • the construction of the loose bearing 37 is illustrated in FIG. 3 .
  • the receptacle 34 depicted on an enlarged scale, shows the loose bearing 37 in the installed state, in which the configuration of the bush 24 ensures a projection 38 with respect to an end-face contour 39 of the receptacle 34 .
  • the projection 38 providing installation play, effectively prevents the disk 31 from bearing against the contour 39 of the receptacle 24 , with the result that the assembly 6 can pivot, unimpeded, in the operating state.
  • FIG. 4 shows an exemplary embodiment with the rotary bearing 17 c , which comprises the holder 19 a according to the exemplary embodiment from FIG. 1 and also the holding means 20 b.
  • the assembly 6 according to FIG. 4 is provided with a parting plane 18 b which is arranged so as to be offset in the direction of the traction means 2 .
  • this construction advantageously reduces a transverse force which is introduced into the rotary bearing 17 c by the traction means 2 in the direction of the arrow, on account of a reduced distance between the traction means 2 and the rotary bearing 17 c.
  • the holding means 20 b comprises merely one fastening lug 40 which is connected to the housing element 16 b and the contact surface 42 of which runs in alignment with the parting plane 18 a .
  • both the parting plane 18 ab and the contact surface 42 can be machined cost-effectively in one operation.
  • a selftapping screw 41 which is screwed in a selfcutting manner into a partially prepared threaded bore 43 of the fastening lug 40 , in order to achieve a positionally fixed support of the bush 24 against the fastening lug 40 via the contact surface 42 .
US11/574,162 2004-08-25 2005-07-29 Centre of Rotation Support for an Assembly Abandoned US20070259745A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102004041044.5 2004-08-25
DE102004041044A DE102004041044A1 (de) 2004-08-25 2004-08-25 Drehpunktlagerung eines Aggregates
PCT/EP2005/008228 WO2006021287A1 (de) 2004-08-25 2005-07-29 Drehpunktlagerung eines aggregates

Publications (1)

Publication Number Publication Date
US20070259745A1 true US20070259745A1 (en) 2007-11-08

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ID=35345126

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/574,162 Abandoned US20070259745A1 (en) 2004-08-25 2005-07-29 Centre of Rotation Support for an Assembly

Country Status (6)

Country Link
US (1) US20070259745A1 (de)
EP (1) EP1781913B1 (de)
KR (1) KR20070047791A (de)
CN (1) CN101006259A (de)
DE (1) DE102004041044A1 (de)
WO (1) WO2006021287A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070272512A1 (en) * 2004-05-31 2007-11-29 Tsuneo Maki Belt conveyance unit and an image formation apparatus
US20080081718A1 (en) * 2006-09-28 2008-04-03 Collier-Hallman Steven J Load dependent belt tensioner
EP2762703A1 (de) 2013-02-04 2014-08-06 Scania CV AB (publ) Verbindungsanordnung
JP2015175363A (ja) * 2014-03-18 2015-10-05 サンデンホールディングス株式会社 エンジン補機の取付装置
US10669976B2 (en) 2016-03-24 2020-06-02 Denso Corporation Fuel supply device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105626261B (zh) * 2016-02-18 2018-06-29 广西玉柴机器股份有限公司 一种多功能前端支撑架
FR3058772B1 (fr) * 2016-11-16 2020-05-08 Renault S.A.S. Moteur equipe d'une liaison elastique pour tendre la courroie de transmission
DE102016226208A1 (de) * 2016-12-23 2018-06-28 Robert Bosch Gmbh Verfahren zur Montage einer Maschine an einem Halteblock
JP7236940B2 (ja) * 2019-06-04 2023-03-10 ダイハツ工業株式会社 内燃機関

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US2856786A (en) * 1955-09-21 1958-10-21 Us Slicing Machine Co Inc Belt tensioner for slicing machines
US5152721A (en) * 1990-09-26 1992-10-06 Gates Power Drive Products, Inc. Belt tensioner and belt drive
US6450907B1 (en) * 2001-03-12 2002-09-17 The Gates Corporation Inner race idler pulley tensioner

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ES182969Y (es) * 1971-08-05 1974-04-16 Robert Bosch G. M. B. H. Generador de corriente alterna.
DE8915249U1 (de) * 1989-12-29 1991-04-25 Robert Bosch Gmbh, 7000 Stuttgart, De
DE4300178C1 (de) 1993-01-07 1994-04-28 Muhr & Bender Riemenspannvorrichtung
JP3309882B2 (ja) 1994-05-02 2002-07-29 株式会社デンソー 発電機
JP3186924B2 (ja) 1994-05-30 2001-07-11 株式会社デンソー 車両用交流発電機
US5938169A (en) * 1996-11-26 1999-08-17 Suzuki Motor Corporation Engine mounting for engine accessory
US6324744B1 (en) * 2000-05-03 2001-12-04 Daimlerchrysler Corporation Method of mounting and axially aligning an engine accessory
DE10057818A1 (de) * 2000-11-21 2002-05-23 Ina Schaeffler Kg Zugmitteltrieb für einen Startergenerator
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Publication number Priority date Publication date Assignee Title
US2856786A (en) * 1955-09-21 1958-10-21 Us Slicing Machine Co Inc Belt tensioner for slicing machines
US5152721A (en) * 1990-09-26 1992-10-06 Gates Power Drive Products, Inc. Belt tensioner and belt drive
US6450907B1 (en) * 2001-03-12 2002-09-17 The Gates Corporation Inner race idler pulley tensioner

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070272512A1 (en) * 2004-05-31 2007-11-29 Tsuneo Maki Belt conveyance unit and an image formation apparatus
US20080081718A1 (en) * 2006-09-28 2008-04-03 Collier-Hallman Steven J Load dependent belt tensioner
EP2762703A1 (de) 2013-02-04 2014-08-06 Scania CV AB (publ) Verbindungsanordnung
JP2015175363A (ja) * 2014-03-18 2015-10-05 サンデンホールディングス株式会社 エンジン補機の取付装置
US10669976B2 (en) 2016-03-24 2020-06-02 Denso Corporation Fuel supply device

Also Published As

Publication number Publication date
EP1781913B1 (de) 2011-09-14
EP1781913A1 (de) 2007-05-09
WO2006021287A1 (de) 2006-03-02
KR20070047791A (ko) 2007-05-07
CN101006259A (zh) 2007-07-25
DE102004041044A1 (de) 2006-03-02

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AS Assignment

Owner name: SCHAEFFLER KG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:PAINTA, RALPH;BOGNER, MICHAEL;REEL/FRAME:018926/0592

Effective date: 20070209

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION